You might want to look at Hughes Engines re; those heads. They sell a fully ported version that "they" claim flow 299cfm @ I believe .700. You also might look at the larger ( big block version ) of the TQ. I believe it is rated at 1100 cfm. They are identical on the outside. Just larger primary's.
The claimed flow is even higher then that. 305 @ .700 or the big mouth version at 319.9 @ .700.
